Printed from: https://conservationhandbooks.com/dry-stone-walling/know-your-stone/characteristic-walling-stones/
The most important types of walling stones are described briefly below. Wallers often use loose generic terms to describe the rock found in their area. For example, the term ‘whinstone’ is used in Scotland and elsewhere to describe hard, dark stones which can include greenstone, basalt, chert or quartzose sandstone. Sandstones Sandstones consist of grains...